Steam-regulator for tapped turbines.



0. JUNGGRBN. STEAMREGULATOR PoR TAPPBD TURBINBS. APPLICATION FILED SEPT.14, 1912.

1,085@ 32, Patented Jan. 27, 1914.

2 lSHEETS-SHEET 1.

Witnesses: Inventor;

amnseREN. 1 STEAM REGULATOR POR TAPPED TUBBINES.

APPLIOATION FILED SEPT. 14, 1912A Patented J 27, 1914u 2 SHEETS*SHEET 2.

Witnesses dust'rial purposes.

- UNITED'STATES PATENT OFFICE.

OSCAR JUNGGREN, OF SCHEINECTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

STEAM-REGULATOR FOR TAPPED TURBINES.

Specification of Letters Patent.

Patenten J an. 27, 1914.

Application ledeptember 14, 1912. Serial No. 720,346.

To all whom it may concern v Be it known that I, OSCAR JUNGGREN, a citizen ofV the United States, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Steam-Regulators for Tapped Turbines, of which the following is a specification.

This invention relates to elastic fluid turbines from which steam is extracted for 4in- In these machines only part of the steam goes through the whole turbine, the other part being drawn ott after passing one or more of the ,high pressure stages and conveyed to heating tems, dye kettles, cooking appliances or other industrial apparatus requiring steam heat.

In some cases, it is necessary that this extracted steam be supplied at a constant pressure, and the object of the present invention is to accomplish this result.

A b 7-pass is provided t'or conveying any surplus of extracted` steam to a lower stage of the turbine, and this by-pass is controlled by a throttle valve connected to actuating mechanism responsive to changes in the pressure in the heating main, so that in case all the extracted steam is not required, the surplus will be diverted through the bv-pass and perform useful work in the lower stages of the turbine.

In the accompanying drawings, Figure l is an elevation of'a portion of a turbine equipped with niv invention. some parts being shown in section; Fig. Q is an elevation at right angles to Fig. 1, and Fig. 23 is a section, looking at the opposite side of Fig. 1.

In the turbine casing l are the bucket wheels 2 and 3. It the turbine has several stages, these wheels would probably be those in the third and fourth stages. The exhaust steam from the wheel 2. enters the chamber l in a separate casing suitablv secured to the turbine casing l, from which it can be carried ot'f through the pipe 5 for heating or other industrial purposes. Adjacent to the chamber l a chamber G communicating with the nozzles T for the wheel 3. Between the chambers el and C is a by-pass S which is controlled b v a valve, prefer-abbrv a buttery valve 9. The position of this valve, and consequently the proportion of steam which passes to the heating pipe 5, depend upon the pressure in said pipe, which acts upon a movable abutment controlling said valve. I prefer touse a fiexible diaphragm l0 whose periphery is tightly clamped to a plate 11. A pi-pe 1Q is tapped through said plate and commiuiicates with the heating pipe 5. so that the diaphragm is exposed on one side to the pressure prevailing in the heating pipe, and on the other side to atmospheric pressure. .The pressure in the heating main which will be sufficient to flex the diaphragm depends partly upon the stitfness of said diaphragm, but it can be adjusted within a considerable range b v attaching to the diaphragm a lever 13 whose free end is connected to a tension spring 1st provided with a screw 15 passingl through an eve in a bracket 1G on the plate ll and provided with a nut 1T for adjusting the tension of the spring. A rod 1S is pivoted to the lever 13 and also to a floating lever 15) whose other ends is connected bv a link Q0 to an arm Q1 on the spindle of the valve S).V A lever Q2 also is attached to said spindle and is suitably connected to the piston ot a hydraulic niotor supplied with liquid undei pressure, such as oil from the forced lubrication svstem. The pilot valve '24, which controls the admission ot oil/to the motor, is connected to the floating lever 19.

The operation ot' the invention is as follows: nder normal conditions. the b vpass throttle valve 9 will stand partly open to permit a port-ion of the steam exhausting troni wheel Q to pass to wheel :1. retaining only enough to keep the pressure in the heating pipe4 5 at a predetermined constant value. Should the pressure in pipeV 5 ifncrcase for any reason, sav from the shutting down ot' some of the heating apparatus. the diaphragm 10 will lift the floating lever 19 and the pilot valve Q4, admitting pressure to the front end of the motor and therebv opening the valve 9 a little wider so that a large proportion of the steam will flow to the wheel 3. This will reduce the normal pressure in the heating` s vstei'n and restore itto noi'iiial. The arm Qi turns with the valve 9 and draws down the ttoating lever, so that the pilot valve will be returned to its normal position and the valve 9 held in its new position; the arm Q1 and cient to operate this device, which will hold the pressure in the heating syst-em at or close to a predetermined constant. value..

In accordance with the provisions of the patent statutes, I have described the principleof operation of my invention, together with the apparatus which l now consider to represent the besteembodiment thereof; but I desire to have it understood that the apparatus shown is only illustrative, and that the invention can be carried out by other means. i

lVhat- I clalm as new and desire to secure i by Let-ters Patent of the United States, is

The combination with a turbine comprising a plurality of stages, of a separate casing secured to' the turbine casing and having a partition dividing itinto a plurality of chambers, one of said chambers communicating with one stage of the turbine and the' other communicating with alower stage, and tliereheing an opening through said partition connecting said chambers, a

conduit leading from the lirst. mentioned,vr

one of said chambers through which steamvl may be drawn for industrial purposes, n.

rotary valve in said opening, a motor for operating said valve secured to said casing and having its piston connected with an arm y on the valve spindle, and a device for con.- trolling the supply of fluid to said motor and the actuation of said valve which is rcsponsive to the pressure of the steam on the side of said valve from which steam isk drawn as aforesaid. n Witness whereof, have hereunto set my hand this 13th day of September, 191i'. 

